Good catch! Thanks. 
But I’m typing these posts on my tablet which isn’t nearly so “helpful”. But just in case I checked; it still thinks “bunped” is a typo and "bumped " is OK. Whew! The humans might still be winning. For now. A little.
I travel through Inman Square every now and then, I’ll have to keep an eye out and see if that design gets adopted.
A bit of trivia for you. One of the background artists for The Simpsons grew up in Chelmsford. The Chelmsford Public Library in your link is said to have been the inspiration for the look Springfield city hall.
Cleveland’s Public Square has become more roundabout-like in the past year or so, with the north-south street now closed through the middle, and the east-west street open only to buses. It’s still got five or six lights, though.
How strange. The map view shows the dogbone, but the satellite view shows a 5-way intersection. Old imagery, sure, but the copyright at the bottom says 2017. The dogbone must be very new.
ETA: Also, the surrounding empty lots appear to show them clearing/grading some areas where the dogbone passes. So it looks like they caught it just as they started construction.
Well, they’re handy for when you call it morning driving through the sound and in and out the valley.
We walk through Inman a few times a week. The change is due to a bicyclist getting killed there last year because of the difficult intersection. They’ve already made left hand turns illegal (although they haven’t been able to put in a physical barrier yet). The fire station makes any simple barriers difficult.
Troy, NH has a main street that works as a roundabout. It’s sort of bone shaped: southbound traffic on the road to the west; northbound traffic on the road to the east. To get to High Street from the south you have to go all the way through the main drag, turn left and then go back again.
“Dog bone” roundabouts are somewhat common when a roundabout is used at the intersection of a street and a pair of freeway ramps. The only traffic that would use the missing segment at each end would be people making U-turns.
A little east of those previous links is a tri-oval.
Here’s a dog bone at a motorway junction in the Netherlands. The next junction to the northwest also has one. This one in England is pretty similar to the Boise one, with streets that cross at a sharp angle.
I spend the day your way
I’m glad I looked up the lyrics to this old classic, because I always thought that
Mountains come out of the sky and they stand there
was instead
Mama’s come out of the sky and they stand there
Cool. I’ll be visiting Boise in a couple of weeks and will look for this… BUT – how strange – ooking at satellite view, that dog bone roundabout is gone(!):
In my experience, irregular shaped roundabouts are not very common.
I’ve used the latter one. The “rounded square” part is arguably the opposite of a SPUI. It has a light at each corner (so it definitely isn’t a roundabout either), meaning a left turn can require three stops.
Wow, you’re right. That’s *tres *evil; just about the worst possible combination of ways to minimize throughput. I hadn’t zoomed in far enough to really see what was going on there plus the map overlaid with the photo messes each separate view up. Plus the fun with the HOV interchange piled on top of the non-HOV interchange.
That oughta teach me about being hasty.
I’ve encountered a lot of junctions that are sort of functionally similar to that, but composed of two, linked, complete roundabouts - like this one:
That *two roundabouts & a bridge *style is now gaining traction in the US for interchanges between a limited access highway and a low-traffic cross road. It avoids the expense and flow restriction of two traffic lights and doesn’t need as much real estate as the cloverleaf design.
The biggest problem remains ignorant local resistance to anything novel in road design.
Completed October 2016, according to reports.
I’m surprised they didn’t just make that a single oval shaped one. The two lanes between the centers go in opposite directions which could be confusing since they’re passing each other on the opposite side than traffic usually does.
Couldn’t find any indication it’s being put into effect. Which isn’t too surprising. That’s a major intersection in that city, so they’re not going to rush the job.
Definitely not a modern roundabout, since those weren’t invented until the mid-60s. That first image shows a royal mess, by the way. I’d hate to have to drive through it.
Here is a double roundabout right outside the Swiss town of Fribourg: Google Maps. My wife and I lived a couple blocks away and shopped at a Jumbo supermarket which now seems to have morphed into a sporting goods store.
I have to ask my son about the peanutabout. He just happens to be Director of Traffic and Parking for Cambridge. Unfortunately, he is now on a 9 day cruise of the Baltic between Copenhagen and St. Petersburg.
Like these? God, I wish we had more of them! They work superbly, much better than awaiting a light.
Close but not exactly. That one has some extra features and looks like a remodeled cloverleaf. It’s wasting vast amounts of real estate.
I was responding to this post from the UK
Net of LHD/RHD differences, this style is all the rage in some of the more rural states. Instead of the traditional “diamond interchange” with off-ramps ending in stop signs or traffic lights, two small roundabouts keep everything flowing all the time.
They’re especially excellent when most of the traffic is one way. Like a distant bedroom community where everybody is going to the highway and getting on in the morning and the same everybody is returning *en masse *the other way in the evening.